Pool drain



FIG. 1 is a perspective view of a pool drain;

FIG. 2 is a top view of the pool drain;

FIG. 3 is a right side view of the pool drain, the left side view being a mirror image thereof; and,

FIG. 4 is a front view of the pool drain, the rear view being a mirror image thereof.

The broken lines shown in the drawings depict portions of the pool drain that form no part of the claim. 

CLAIM I claim the ornamental design for a pool drain, as shown and described. 